Switchboard for electric circuits.



J. J. NIELSEN.

SWITCHBOARD FOR ELECTRIC CIRCUITS APPLICATION FILED MAYL1915.

1,1 92,447. I Patented July 25, 1916.

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J. J. NIELSEN.

SWITCHBOARD FOR ELECTRIC CIRCUITS.

APPLICATION FILED MY 1. ms.

1,1 92,447, Patented July 25, 1916.

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I. J. NIELSEN.

SWITCHBOARD FOR memo cmcuns.

APPLICATION FILED IIAY 1, I915.

1 1 92,447, Y Patented July 25, 1916.

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JULIAN J. NIELSEN, OF CHICAGO, ILLINOIS.

SWITCHBOARD FOR ELECTRIC CIRCUITS.

Application filed May 7, 1915.

To all whom it may concern:

Be it known that I, J ULIAN J. NinLsnN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Switchboards for Electric Circuits, of which the following is a specification.

My invention relates to improvements in switch boards for electric circuits.

()ne of the objects of my invention is to generally improve switch boards.

A special object I have in view is to arrange the parts and appurtenances thereof to provide a more symmetrical structure; to render said parts more accessible and to decrease liability to accident.

Other and further objects of my invention will become readily apparent, to persons skilled in the art, from-a consideration of the following description when taken in conjunction with the drawings, wherein Figure 1 is a front elevation of a panel of a typical multi-panel board. Fig. 2 is a transverse section thereof taken on line 22 of Fig. 1. Fig. 3 is an enlarged detail. Fig. 4 is a vertical section taken on line 4E l of Fig. 2. Fig. 5 is a transverse section taken on line 5-5 of Fig. 2. Fig. 6 is a section taken 011 line G6 of Fig. 2. Fig. 7 is a diagram of circuits.

In all the views the same reference characters are employed to indicate similar parts.

My invention is shown in connection with a three wire circuit of distribution, and a plurality of panels, on which the usual and necessary appurtenances and appliances are mounted.

I-Ieretofore the board terminals, those of the conductor branches from the bus bars, for connection with the various distributing feeders, have been mounted directly on the respective panels, usually in the rear thereof and. near the top of said panels, especially in installation where the feeder wires are carried on poles or other overhead supports. The panels of a typical board are relatively narrow and in most instances they are not adapted to safely carry the large number of terminals allotted to each panel, the crowded condition rendering said terminals practically inaccessible and dangerous to the repair-man or operator. In the present exemplification, for instance, there are eighteen board terminals which, on the usual Specification of Letters Patent.

Patented July 25, 1916.

Serial No. 26,607.

form of board, would be carried directly by the panel shown. To mount all of these terminals upon the back of the board proper, as usual in switch board construction, would require them to be unsymmetrically disposed or located and to cause them to be placed so close together as to render repairs, removal and replacement of said terminals and other parts difficult and hazardous at any time while the panel conductors are energized. To overcome these objections I have provided new and improved means for supporting the terminals on the board structure so as to be able to properly space them conveniently for removal and replace ment and repair, grouped with suflicient space around each of the terminals to permit the tools of the workman to be conveniently applied without danger of short circuiting any of the parts.

In the embodiment which I have chosen to illustrate my invention, 10 represents the front face or panel, of the board, which is made usually of marble or like insulating material and which constitutes one panel, in connection with the panels 11 and 12 of the multi-panel board. Vertically disposed angle irons 141-I border each of the longitudinal edges of each of the panels and are held thereto by means of bolts 15. The an gle irons 14: of each of the panels are con nected together at intervals, as by means of bolts 16, and by this means a greater or less number of panels or sections may be added to or taken from the multiple board. Board supporting T irons 17, extend rearwardly 0f the panel 10 and are each provided with downturned portions, or brackets 18, for securing the board structure to the wall 19 as by bolts or screws 20. The front ends of theT irons 17-47 are connected to the vertical angle irons 14.14; respectively, by means of straps 21 and by belts or screws 22. A channel iron 23 is preferably let into the floor 24 and runs parallel with the footing of the board and upon which the angle irons 1414c rest, being secured thereto by angle clips 2525. Angle braces, of flat bar irons 2626 may be connected to the vertically disposed angle irons 14-1I and are diagonally positioned and connected to the T irons 1717 and secured thereto as by screws 27 to add greater strength to the iron frame structure. A sheet steel, or other metal cover plate 28, overlies the T irons 17-17,

and is secured thereto by convenient means and extends back from the front of the panel 10 to a point 29, thereby affording a cover for the active parts of the board to protect them against the introduction of dust or other extraneous matter and serving as a means for supporting the wire conduits 3080. A flat metal horizontally disposed bar 31 is secured to the angle irons 14, as at its outer end being secured to a vertically disposed supporting bar 31, the upper end of which is secured to the T iron 17, as at 35. Mounted on the bar 31 is a plate, or slab of insulating material, such as slate, marble or the like, fixed to the said bar as by means of screws 36. Each of the panels has a structure of this character secured to each of its vertically disposed angle bars 14 and extending rearwardly for connection with the T iron 17, as shown in Fig. 2, for a purpose to be hereinafter more particularly referred to. Mounted upon the front of the panel 10 are three pair, or six, threewire circuit cont-rolling switches 10, 4:0 11, 11 and i2, 1 2.

Brackets e3 are secured to the vertically disposed angle irons 1%, as at n, and extends rearwardly for support of the plates or slabs of insulating material %5 which carries the composite bus bars %6, t? and 18, b ing secured against displacement upon the brackets by bolts 1-9. in Fig. 6 l have designated the bar 46 as a negative bus bar, the bar 18 as a positive bar and the intermediate smaller bar as the neutral bar. Each of these bars is, for convenience, made up of a series of relatively thinner bars joined together by bolts in the usual manner, and by which bolts branch conductors are secured to the respective bars for connecting the said bars to the various parts of the system. A vertically disposed conductor 51 rises from the bus bar l6 and is connected to a cross bar 52 and to the terminal ends of the cross bar 52 are connected rearwardly projecting studs 58, 53 of the switches 10 and #10, respectively. A similar composite bar 5 1, composed of two bars, connects the bus bar 48 with the cross bar 55, the outer ends of which are connected to the studs 5656 of the switches 40 and =10. A single bar 57 connects the neutral bar 17 with across bar 58, the outer ends of which are connected to the studs 5959 of the switches e0, 40": The upper terminals of the switch 4LO1;0 are connected to feed wire distributers 60, 61 and 62, 60, 61 and 62, respectively. These conductors pass from the switch board through the conduits 30-30. The lower terminals of the switches 4e1t1 are connected to the bus bars 4-6, 4.7 and 48 by conductors 63, 64: and 65, respectively. and conductors 63, 6s and 65, respectively, the upper ends of the switches being connected to obliquely disposed rearwardly extending conductors 66, 67, 68, 66, 67 and 68, respectively, and these are connected to vertically disposed conductors 69, 70 and 71. The upper ends of the vertical conductors are connected to feeder terminals 72, 73 and 7%, respectively, that are located upon the slabs or plates of insulated material 36, in rows that extend at right angles to the panel or front board 10, of the structure. Feeder wires 75, T6 and T7 are connected to the waforesaid terminals, respectively, and pass out through the conduits 30 at the top of the board. Conductors similar to these described as connected to switches 10 and 10 are connected to the switches 1-1 and 41 and in like manner rearwardly extending obliquely directed conductors 78, 79 and 80 extend obliquely and rearvmrdly, as shown in Fig. 6, and are connected to vertically extending conductors 81, and 83, respectively, the upper ends of which are con nectcd to feeder terminals Set, and 86, respectively, to which terminals are connected the feeder wires 87, S8 and 89, respectively, that pass out through the conduit 30 located at the top of the board. The lower terminals of the switches 42 and 12" are connected to the bus bars 16, a7 and 4:8, by vertically extending conductors 90, 91 and 92, respectively, that are secured to the inwardly projecting studs 93, 91 and 95 of said switches.

Fig. 3 shows an enlarged detail wherein ascrew threaded stud is provided with a nut 101 and an integral washer 102 and another nut 103 located on the end of the screw threaded portion of the stud, between which are included bar conductors 10st and 105 with a spacing washer 106 threaded on the stud included between said washer. This is typical of the means adopted for connecting the projecting studs from the switches with the respective conducting bars.

By referring to the plan view shown in Figs. 5 and 6, it will be observed that there is sufficient room for the operator to stand within each of the switch board panels, and that each and every conductor and terminal is accessible to the operator and that each and every one of the terminals may be inspected and separately disconnected without danger.

Having described my invention, what I claim is 1. A switch board, comprising a front panel; switches mounted thereon, having terminals on the rear surface thereof; rearwardly extending panel supports; feeder terminals arranged near the top of the board and supported in a line at substantial right angles to said panel, by said panel support; obliquely deflected conductors, extending rearwardly and obliquely in a horizontal plane from said switch terminals for connection with said feeder terminals; and vertically extending conductors for connection with said obliquely extending conductors,

the upper ends whereof are connected to said feeder terminals.

2. A composite-panel switch board, comprising a series of instrument-receiving vertical panel plates of insulating material; instruments mounted thereon having terminals at the back thereof; wall-engaging braces connected to the top of each panel and extending rearwardly therefrom; a longitudinal series of feeder terminals arranged substantially in parallel line with said braces and a top cover plate supported on said braces extending rearwardly over said feeder terminals and having openings for support of feeder carrying conduits.

3. A composite-panel switch board, comprising a series of instrument-receiving, vertical plates of insulating material; instruments mounted thereon, having terminals at the back thereof; wall-engaging braces connected to the upper part of each panel and extending rearwardly therefrom; a longitudinal series of feeder-terminals arranged in substantial parallel line with said braces; connections from said instruments extending rearwardly and obliquely for connection with said feeder terminals and a top cover plate supported on said braces, extending rearwardly over said feeder terminals in line substantially parallel therewith and having openings for support of feedercarrying conduits.

In testimony whereof I hereunto set my hand in the presence of two subscribing witnesses.

JULIAN J. NIELSEN. In the presence of Fomin BAIN; MARY F. ALLEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

